Improvement in machines foe bending wood



JOSEPH HAL-E, or SoMEnv-ILLE, MASSACHUSETTS.

Letters .Patent No.A 77,036, dated April 21, 1868.

IMPROVEMENT IN MAGHINBS ron BBNDING Wohn.

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Be it known that I, JosEPII'HAnE, of Somerville, in the county of Middlesex,and State ofMassachusetts,

have invented an Improved Machine for Windingflelices; and I do hereby declare that the following, taken in connection with the drawings which'iaeeompany and form part of this specification, is a description of my invention suliieient to enable those skilled in the art to practise it.

This'invention is designed for use in the manufacture of bent wooden washers, patented to me, in the United States, August Si, 1867, under the number 68,624; said invention consisting in the detail of construction and arrangement of machine for winding helices with their coilsI in contact with each other. l

Figure 1 of the drawings is a sectional elevation of my improved machine, the section being taken in its central vertical `longitudinal plane, denoted by line e e, (seen in lfigure 2,) whichis a cross vertical section,

taken in the plane ofthe line y y, (seen in iig. 1,) and showing the parts in end elevation beyond.

The frame a resembles` a lathe-bed, having guides orways b, on which can move a kindof cross-head, c. This cross-head contains a tube, d, throughI which passes and in which rotates the winding-arbor e. This sleeve is arranged with keys, so that it is prevented from rotating in the cross-head, fromwhieh it can be removed, and others can be substituted of different sizes suited to use with dilerent-sized winding-mandrels, and differente sitedy strips which are to be wound.

;One end of this sleeve has an inclined formation, such as is shown in the detail view, Figures 3 and 4; the inclined face f being the surfacewhich operates under the rotation of the mandrel e topack the coils of the helices together, and to cause the cross-head c to move alongv the mandrel, leaving behind a helix closely coiled upon the mandrel. i l v In ceiling the helix, a strip of metal, of la width equal to the width of the material to be coiled, is wound with the wooden strip upon the arbor, to prevent splintering yof the wood in theoperation of winding.

I makeuse of thev steel material used for making hoop-skirts, for the metal strip, s o wound with the wooden strip.

The thickness ot the tube d is equal to the thickness of the wooden strip to be wound, plus the thickness of the metal strip. Then the inclined face of the tube d is made as follows: i

A slot er groove, which will just receive th'e end of'the wooden strip, with its metal-back strip, is eut into the end of the tube, tangentially to its inner and outer diametersfand then the end of the tube is bevelled or inclined uniformly, so that ,the inclined surface continues from where the upper outer corner of the strip enters the groove in the tube, around thetube to the diagonal corner of the entered Strip, which is its lower inner corner. Then, overv the end of the tube d, a squarely-turned ring, l, is placed, with its face in line withthe outer upper corner of the entering-strip. The mandrel e is iixedin any suitable chuck, g, arranged to be rotated, and provided with a gear, It, which meshes into gear t' xed on a screw-shaft, j, the purpose of which is to draw back the cross-head to its starting-place, near the chuck, previous to starting to wind a new helix; there being on the cross-head nip'pers le, through manipulation of whielueonnectioncan be made and broken between the' screw and the cross-head.

The wooden strip which is to be wound is marked m, and the ilat steel strip, which is wound on theoutside of thehelix, is marked n; this metal strip having its end caught into aihole made for the purposein the mandrel; In practice, I secure to the cross-head, so as to move with it, a steam-box, in which the Wooden pieces to be wound are prepared lby steaming, and are drawn forth, in winding, through an opening therein, one end of each strip being caught, as it enters the groove or slot .in the tube d, between the mandrel and the meta-l strip n. The steam-box is not shown in the drawings, as in itself there is nothing specially novel. The steam-pipe entering it may be of iicxible tubing, to permit its movement with the cross-head.

As the strips pass from the steamLbox to the winding-mandrel, they pass through a kind of directing-trough,- (seen in plan in Figure 5;) said trough being pivotcd at o, so that, by'a cam, p, its free end can 'be swung against the periphery of ring l, and can be held there, while the side q of the trough is pivotcd at r, and can be adjusted' by screw s so as to press the entering strip against the inclined surface f of the tubed; the said trough and' all the parte therewith connected being, of course,.ixed to the cross-head, so as to move therewith.

To pack the sides of the strip closely in a helical coil, it is necessary to produce a friction on the crosshcad tuprevent it from moving'too easily on the ways b, as the strip m is drawn by rotation of the mandrel e against the inclined face j' of tbe tube d. To` produce this friction, I apply-to the cross-head, jaws t, which can be expanded by the action of 'incline u and screw v, so as to cause the jaws to bear more or-less firmly against the lower ways b.

With a steamed strip entered between the mandrel and the metal strip, .and with the sarer j disconnected from the nippers k, and with the proper adjustment of the trough having the movable sidc'q, rotatiorLof the mandrel in the proper direction willwind the strip into a helix covered by lthe metal strip, the inclined faceV causing longitudinal Vmovement; of the'cross-heacl toward the free end of the mandrel, so that, when the crosshead reaches the other end of the frame, it is covered with helically-wonnd strips of wood, which are covered by helically-wound'strips'of the metal. -Thc mandrel may then be removed' from its nchuck g, and the tube o? can be placed. in an oven for'the wood thereon to dry. A new arbor is placed in the chuck, and its end is entered intothe tube d, whenthe nppers Icare geared into the screw j, and, by rotation of said screw, the cross-head isdrawn back' near to the chuck, and the described operation is repeated.

It is evident`that thecross-head may brexed upon the frame, in which ease the winding-mandrel would have an endwise traverse as well as a rotary.movement. ,This modification would, on account of leaving the, steam-'box stationary with the cross-head instead 'of' moving with it, have advantages land conveniences over allowing the cross-head to move, carrying the steam-box with git.

I claimv 1. In combination with theitube d andwith'the mandrel e, when 4the arrangement is such that tho notion ofthe incline of said tubcand the rotation of themandrcl cause a relative movement between the said parts, they entering-trough, made adjustable to the diameter of the tube, and to the width vof the'strip being wound.

2. The adjustable`frictiondevice, combined with the crss-heavd carrying the inclinedfaced tube.

JOSEPH HALE.

Witnesses:

J. B. Caesar, FnANers Govan. 

